Combustion chamber injection system - aircraft engine , Other Engineering

Assignment Help:

Combustion chamber injection system:

Injecting a water or water/methanol mixture into the combustion chambers increases the mass flow through the turbine and the high volumetric expansion as the water becomes steam increases the thrust. The pressure and temperature drop across the turbine is reduced and this further increases the thrust. The reduction in turbine inlet temperature due to water injection enables the fuel system to provide an increased fuel flow to restore the maximum speed of the engine, thus providing further additional thrust without exceeding the safe turbine gas temperature limits. When methanol is used with the water the turbine inlet temperature is partially restored without extra fuel from the fuel system.

Water flows from an aircraft-mounted tank to an air turbine driven water pump and is delivered to a water flow sensing unit. From the water sensing unit the mixture is distributed to the burner feed arms where two jets at the base of each arm spray the mixture on to the upstream side of the swirl vanes to cool the air entering the combustion zone. The water pressure between the sensing unit and the discharge jets, is sensed by the fuel system control, which automatically resets the engine speed governor to give a higher maximum engine speed.

17_Combustion chamber injection system.png

The water system is brought into operation when the throttle lever is moved into the take-off position where it closes micro-switches to provide an air supply for the air turbine-powered water pump. The water flow sensing valve opens when a correct pressure difference exists between water pressure and compressor delivery air pressure. The valve in the water flow sensing unit also acts as a non-return valve to prevent air pressure feeding back from the water discharge jets and provides for the operation of an indicator to show when water/methanol is flowing.

598_Combustion chamber injection system1.png


Related Discussions:- Combustion chamber injection system - aircraft engine

Communication and scholarship, Illustrate the importance of communication i...

Illustrate the importance of communication in a retail business organisation?25 marks

Oil pumps - aircraft engine, OIL PUMPS The oil pumps fitted in a recirc...

OIL PUMPS The oil pumps fitted in a recirculatory system are normally gear-type or Gerotor type pumps. The pumps are usually mounted in a pack containing one pressure pump and

Strain energy release rate , The energy release rate, often denoted by G, i...

The energy release rate, often denoted by G, is the amount of energy per unit area that is supplied by the elastic energy in the body and loading system in creating a new fracture

Jfet self biasing, VDD=20V,RG=1MOHM,RD=3.3KOHM,RS=1KOHM,IDSS=8MA,VP=-6VFIND...

VDD=20V,RG=1MOHM,RD=3.3KOHM,RS=1KOHM,IDSS=8MA,VP=-6VFINDIDQ,VGSQ,VDS,VG,VD

Basic principles - propeller, BASIC PRINCIPLES : The purpose of a prope...

BASIC PRINCIPLES : The purpose of a propeller is to convert the power developed by the engine into a useful force called 'Thrust'. This force must be equal to and opposite in

Electronic devices, give a criticalanalysis of a zener diodedata with suita...

give a criticalanalysis of a zener diodedata with suitable chracteristicsand applications

Degeneracy , If a single energy eigen value corresponds to more than one ei...

If a single energy eigen value corresponds to more than one eigen function then degeneracy is said to be exist and the number of wave function associated with a single value of ene

Rake angle, the effect when side relief angle is too much

the effect when side relief angle is too much

Cash flows, Your company is considering a machine that will cost $6,287 at ...

Your company is considering a machine that will cost $6,287 at Time 0 and which can be sold after 3 years for $790. To operate the machine, $886 must be invested at Time 0 in inven

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd